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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2015 Daniel Campora
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/mpconfig.h"
#include MICROPY_HAL_H
#include "py/obj.h"
#include "py/runtime.h"
#include "inc/hw_types.h"
#include "inc/hw_gpio.h"
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "rom_map.h"
#include "pin.h"
#include "prcm.h"
#include "gpio.h"
#include "sdhost.h"
#include "pybpin.h"
#include "pybsd.h"
#include "ff.h"
#include "diskio.h"
#include "sd_diskio.h"
#include "simplelink.h"
#include "debug.h"
#include "mpexception.h"
#include "pybsleep.h"
#if MICROPY_HW_HAS_SDCARD
#define PYBSD_FREQUENCY_HZ 15000000 // 15MHz
typedef struct {
mp_obj_base_t base;
FATFS *fatfs;
pin_obj_t *pin_clk;
bool pinsset;
bool enabled;
} pybsd_obj_t;
/******************************************************************************
DECLARE PRIVATE DATA
******************************************************************************/
STATIC pybsd_obj_t pybsd_obj;
/******************************************************************************
DECLARE PRIVATE FUNCTIONS
******************************************************************************/
STATIC mp_obj_t pybsd_make_new (mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args);
STATIC mp_obj_t pybsd_disable (mp_obj_t self_in);
STATIC mp_obj_t pybsd_enable (mp_obj_t self_in);
/******************************************************************************
DEFINE PUBLIC FUNCTIONS
******************************************************************************/
__attribute__ ((section (".boot")))
void pybsd_init0 (void) {
// allocate memory for the sd file system
ASSERT ((pybsd_obj.fatfs = mem_Malloc(sizeof(FATFS))) != NULL);
}
void pybsd_deinit (void) {
pybsd_disable ((mp_obj_t)&pybsd_obj);
}
/******************************************************************************
DEFINE PRIVATE FUNCTIONS
******************************************************************************/
/// Initalizes the sd card driver
STATIC void pybsd_init (pybsd_obj_t *self) {
// Configure the clock pin as output only
MAP_PinDirModeSet(self->pin_clk->pin_num, PIN_DIR_MODE_OUT);
// Enable SD peripheral clock
MAP_PRCMPeripheralClkEnable(PRCM_SDHOST, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
// Reset MMCHS
MAP_PRCMPeripheralReset(PRCM_SDHOST);
// Initialize MMCHS
MAP_SDHostInit(SDHOST_BASE);
// Configure the card clock
MAP_SDHostSetExpClk(SDHOST_BASE, MAP_PRCMPeripheralClockGet(PRCM_SDHOST), PYBSD_FREQUENCY_HZ);
}
/******************************************************************************/
// Micro Python bindings
//
/// \classmethod \constructor()
/// Configure the pins used for the sd card.
/// May receive 0, or 6 arguments.
///
/// Usage:
/// sd = pyb.SD()
////
/// sd = pyb.SD(d0_pin, d0_af, clk_pin, clk_af, cmd_pin, cmd_af)
///
STATIC mp_obj_t pybsd_make_new (mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 0, 6, false);
if (n_args == 6) {
// save the clock pin for later use
pybsd_obj.pin_clk = (pin_obj_t *)pin_find(args[2]);
// configure the data pin with pull-up enabled
pin_config ((pin_obj_t *)pin_find(args[0]), mp_obj_get_int(args[1]), 0, PIN_TYPE_STD_PU, PIN_STRENGTH_4MA);
// configure the clock pin
pin_config (pybsd_obj.pin_clk, mp_obj_get_int(args[3]), 0, PIN_TYPE_STD, PIN_STRENGTH_4MA);
// configure the command pin with pull-up enabled
pin_config ((pin_obj_t *)pin_find(args[4]), mp_obj_get_int(args[5]), 0, PIN_TYPE_STD_PU, PIN_STRENGTH_4MA);
pybsd_obj.pinsset = true;
pybsd_obj.base.type = &pyb_sd_type;
}
else if (!pybsd_obj.pinsset) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, mpexception_num_type_invalid_arguments));
}
return &pybsd_obj;
}
/// \method enable()
/// Enables the sd card and mounts the file system
STATIC mp_obj_t pybsd_enable (mp_obj_t self_in) {
pybsd_obj_t *self = self_in;
if (!self->enabled) {
// do the init first
pybsd_init (self);
// try to mount the sd card on /sd
if (FR_OK != f_mount(self->fatfs, "/sd", 1)) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_operation_failed));
}
mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_sd));
mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_sd_slash_lib));
// register it with the sleep module
pybsleep_add ((const mp_obj_t)&pybsd_obj, (WakeUpCB_t)pybsd_init);
self->enabled = true;
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pybsd_enable_obj, pybsd_enable);
/// \method disable()
/// Disables the sd card and unmounts the file system
STATIC mp_obj_t pybsd_disable (mp_obj_t self_in) {
pybsd_obj_t *self = self_in;
if (self->enabled) {
self->enabled = false;
// unmount the sd card
f_mount (NULL, "/sd", 1);
// remove sd paths from mp_sys_path
mp_obj_list_remove(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_sd));
mp_obj_list_remove(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_sd_slash_lib));
// disable the peripheral
MAP_PRCMPeripheralClkDisable(PRCM_SDHOST, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
// de-initialze de sd card at diskio level
sd_disk_deinit();
// unregister it with the sleep module
pybsleep_remove (self);
// change the drive in case it was /sd
f_chdrive("/flash");
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pybsd_disable_obj, pybsd_disable);
STATIC const mp_map_elem_t pybsd_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_enable), (mp_obj_t)&pybsd_enable_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_disable), (mp_obj_t)&pybsd_disable_obj },
};
STATIC MP_DEFINE_CONST_DICT(pybsd_locals_dict, pybsd_locals_dict_table);
const mp_obj_type_t pyb_sd_type = {
{ &mp_type_type },
.name = MP_QSTR_SD,
.make_new = pybsd_make_new,
.locals_dict = (mp_obj_t)&pybsd_locals_dict,
};
#endif // MICROPY_HW_HAS_SDCARD
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